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Nwaechefu OO, Olaolu TD, Akinwunmi IR, Ojezele OO, Olorunsogo OO. Cajanus cajan ameliorated CCl 4-induced oxidative stress in Wistar rats via the combined mechanisms of anti-inflammation and mitochondrial-membrane transition pore inhibition. JOURNAL OF ETHNOPHARMACOLOGY 2022; 289:114920. [PMID: 35032580 DOI: 10.1016/j.jep.2021.114920] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 12/07/2021] [Accepted: 12/13/2021] [Indexed: 06/14/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Liver diseases is a public health issue in sub-saharan Africa and has been reported to be the major cause of many hospital admissions. Oxidative stress, mitochondrial dysfunction and inflammation play important roles in several diseases including liver injury. Cajanus cajan is an indigenous medicinal plant useful in the traditional treatment of jaundice, inflammation and liver injury. AIM OF STUDY This study assessed the effects of methanol extract Cajanus cajan (MECC) on mitochondrial permeability transition (mPT) pore opening, biomarkers of oxidative stress and inflammation in CCl4-induced liver injury in rats. METHODS Wistar albino rats (200-210g) were completely randomized into five (5) groups of six animals each. Group I (control) was given distilled water orally once daily. Animals in group II were administered CCl4 in parafin (1:1) at a dose of 0.5 mL/kg i.p on the seventh day. Animals in groups III, IV and V were administered methanol extract of Cajanus cajan (MECC) at doses of 100, 200 mg/kg and silymarin (100 mg/kg) respectively for 7 days prior to a single intraperitoneal dose of CCl4. After 24 h of CCl4 treatment, serum and liver tissues were collected. Mitochondrial permeability transition (mPT) pore opening, mitochondrial ATPase activities and biomarkers of oxidative stress were determined spectrophotometrically. Tumor necrosis factor (TNFα), NF-κB and COX-2 were determined by immunohistochemistry and the phytochemicals present in the extract were determined by GC-MS. RESULTS Liver enzyme (AST, ALP, ALT and γGT) activities and MDA levels were significantly decreased in rats pretreated with MECC at the dose of 100, 200 and silymarin (100 mg/kg) when compared to the rats administered CCl4 alone (p < 0.05). GSH, GST, CAT and SOD increased and the expressions of TNFα, NF-κB and COX- 2 were also reduced when compared to the CCl4- treated animals. In addition, the liver histopathological analyses revealed that MECC markedly alleviated inflammatory cell infiltration, hepatic fibrosis, hepatocyte ballooning, necrosis and severe apoptosis of hepatocytes induced by CCl4. GC-MS analysis yielded 23 compounds including flavonoids, terpenoids and fatty acids. CONCLUSION Cajanus cajan leaf extract elicited hepatoprotective action on CCl4-induced liver injury via inhibition of mPT pore opening, prevention of CCl4-induced hepatic oxidative stress and suppression of inflammatory response thus it may become useful for chemoprevention of liver injury. This supports its traditional use.
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Affiliation(s)
- Olajumoke Olufunlayo Nwaechefu
- Laboratories for Biomembrane Research and Biotechnology, Department of Biochemistry, College of Medicine, University of Ibadan, Nigeria; Department of Biochemistry, Lead City University, Ibadan, Nigeria.
| | - Tomilola Debby Olaolu
- Laboratories for Biomembrane Research and Biotechnology, Department of Biochemistry, College of Medicine, University of Ibadan, Nigeria; Department of Biochemistry, Landmark University, Omu-aran, Nigeria
| | - Ifeoluwa Racheal Akinwunmi
- Laboratories for Biomembrane Research and Biotechnology, Department of Biochemistry, College of Medicine, University of Ibadan, Nigeria; Department of Biochemistry, University of Lagos, Nigeria
| | - Omotunde Oluwaseyi Ojezele
- Laboratories for Biomembrane Research and Biotechnology, Department of Biochemistry, College of Medicine, University of Ibadan, Nigeria
| | - Olufunso Olabode Olorunsogo
- Laboratories for Biomembrane Research and Biotechnology, Department of Biochemistry, College of Medicine, University of Ibadan, Nigeria
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Das R, Mitra S, Tareq AM, Emran TB, Hossain MJ, Alqahtani AM, Alghazwani Y, Dhama K, Simal-Gandara J. Medicinal plants used against hepatic disorders in Bangladesh: A comprehensive review. JOURNAL OF ETHNOPHARMACOLOGY 2022; 282:114588. [PMID: 34480997 DOI: 10.1016/j.jep.2021.114588] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 08/19/2021] [Accepted: 08/29/2021] [Indexed: 06/13/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Liver disease is a major cause of illness and death worldwide which accounts for approximately 2 million deaths per year worldwide, 1 million due to complications of cirrhosis and 1 million due to viral hepatitis and hepatocellular carcinoma. That's why it is seeking the researchers' attention to find out the effective treatment strategies. Phytochemicals from natural resources are the main leads for the development of noble hepatoprotective drugs. The majority of the natural sources whose active compounds are currently employed actually have an ethnomedical use. Ethnopharmacological research is essential for the development of these bioactive compounds. These studies not only provide scientific evidence on medicinal plants utilized for particular therapeutic purposes, but they also ensure cultural heritage preservation. Plenty of experimental studies have been well-documented that the ethnomedicinal plants are of therapeutics' interest for the advanced pharmacological intervention in terms of hepatic disorders. AIM OF THE STUDY This study summarizes the processes of hepatotoxicity induced by various toxins and explores identified hepatoprotective plants and their phytoconstituents, which can guide the extraction of novel phytochemical constituents from plants to treat liver injury. This review aimed to summarize the hepatoprotective activity of Bangladeshi medicinal plants where the bioactive compounds may be leads for the drug discovery in future. MATERIALS AND METHODS Literature searches in electronic databases, such as Web of Science, Science Direct, SpringerLink, PubMed, Google Scholar, Semantic Scholar, Scopus, BanglaJOL, and so on, were performed using the keywords 'Bangladesh', 'ethnomedicinal plants', 'Hepatoprotective agents' as for primary searches, and secondary search terms were used as follows, either alone or in combination: traditional medicine, medicinal plants, folk medicine, liver, hepatitis, therapeutic uses, and anti-inflammatory. Besides, several books, including the book entitled "Medicinal plants of Bangladesh: chemical constituents and uses" authored by Abdul Ghani, were carefully considered, which contained pharmacological properties and phytoconstituents of many medicinal plants growing and traditionally available in Bangladesh. Among them, the most promising plant species with their latest therapeutic effects against hepatic disorders were deeply considered in this review. RESULTS The results of this study revealed that in most cases, therapy using plant extracts stabilized altered hepatic biochemical markers induced by hepatotoxins. Initially, we investigated 32 plant species for hepatoprotective activity, however after extensive literature searching; we observed that 20 plants offer good pharmacological evidence of hepatoprotective function. Consequently, most bioactive compounds derived from the herbs including berberine, thymoquinone, andrographolide, ursolic acid, luteolin, naringenin, genistein, quercetin, troxerutin, morin, epigallocatechin-3-gallate, chlorogenic acid, emodin, curcumin, resveratrol, capsaicin, ellagic acid, etc. are appeared to be effective against hepatic disorders. CONCLUSIONS Flavonoids, phenolic acids, monoterpenoids, diterpenoids, triterpenoids, alkaloids, chromenes, capsaicinoids, curcuminoids, and anthraquinones are among the phytoconstituents were appraised to have hepatoprotective activities. All the actions displayed by these ethnomedicinal plants could make them serve as leads in the formulation of drugs with higher efficacy to treat hepatic disorders.
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Affiliation(s)
- Rajib Das
- Department of Pharmacy, Faculty of Pharmacy, University of Dhaka, Dhaka, 1000, Bangladesh
| | - Saikat Mitra
- Department of Pharmacy, Faculty of Pharmacy, University of Dhaka, Dhaka, 1000, Bangladesh
| | - Abu Montakim Tareq
- Department of Pharmacy, International Islamic University Chittagong, Chittagong, 4318, Bangladesh
| | - Talha Bin Emran
- Department of Pharmacy, BGC Trust University Bangladesh, Chittagong, 4381, Bangladesh.
| | - Md Jamal Hossain
- Department of Pharmacy, State University of Bangladesh, 77 Satmasjid Road, Dhanmondi, Dhaka, 1205, Bangladesh
| | - Ali M Alqahtani
- Department of Pharmacology, College of Pharmacy, King Khalid University, Abha, 62529, Saudi Arabia
| | - Yahia Alghazwani
- Department of Pharmacology, College of Pharmacy, King Khalid University, Abha, 62529, Saudi Arabia
| | - Kuldeep Dhama
- Division of Pathology, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareil-ly, 243122, Uttar Pradesh, India
| | - Jesus Simal-Gandara
- Nutrition and Bromatology Group, Department of Analytical and Food Chemistry, Faculty of Food Science and Technology, University of Vigo - Ourense Campus, E32004, Ourense, Spain.
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Shakeel F, Alamer MM, Alam P, Alshetaili A, Haq N, Alanazi FK, Alshehri S, Ghoneim MM, Alsarra IA. Hepatoprotective Effects of Bioflavonoid Luteolin Using Self-Nanoemulsifying Drug Delivery System. Molecules 2021; 26:7497. [PMID: 34946581 PMCID: PMC8703857 DOI: 10.3390/molecules26247497] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 12/06/2021] [Accepted: 12/08/2021] [Indexed: 12/30/2022] Open
Abstract
Luteolin (LUT) is a natural pharmaceutical compound that is weakly water soluble and has low bioavailability when taken orally. As a result, the goal of this research was to create self-nanoemulsifying drug delivery systems (SNEDDS) for LUT in an attempt to improve its in vitro dissolution and hepatoprotective effects, resulting in increased oral bioavailability. Using the aqueous phase titration approach and the creation of pseudo-ternary phase diagrams with Capryol-PGMC (oil phase), Tween-80 (surfactant), and Transcutol-HP (co-emulsifier), various SNEDDS of LUT were generated. SNEDDS were assessed for droplet size, polydispersity index (PDI), zeta potential (ZP), refractive index (RI), and percent of transmittance (percent T) after undergoing several thermodynamic stability and self-nanoemulsification experiments. When compared to LUT suspension, the developed SNEDDS revealed considerable LUT release from all SNEDDS. Droplet size was 40 nm, PDI was <0.3, ZP was -30.58 mV, RI was 1.40, percent T was >98 percent, and drug release profile was >96 percent in optimized SNEDDS of LUT. For in vivo hepatoprotective testing in rats, optimized SNEDDS was chosen. When compared to LUT suspension, hepatoprotective tests showed that optimized LUT SNEDDS had a substantial hepatoprotective impact. The findings of this investigation suggested that SNEDDS could improve bioflavonoid LUT dissolution rate and therapeutic efficacy.
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Affiliation(s)
- Faiyaz Shakeel
- Kayyali Chair for Pharmaceutical Industries, Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia; (M.M.A.); (N.H.); (F.K.A.)
| | - Moad M. Alamer
- Kayyali Chair for Pharmaceutical Industries, Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia; (M.M.A.); (N.H.); (F.K.A.)
| | - Prawez Alam
- Department of Pharmacognosy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia;
| | - Abdullah Alshetaili
- Department of Pharmaceutics, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia;
| | - Nazrul Haq
- Kayyali Chair for Pharmaceutical Industries, Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia; (M.M.A.); (N.H.); (F.K.A.)
| | - Fars K. Alanazi
- Kayyali Chair for Pharmaceutical Industries, Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia; (M.M.A.); (N.H.); (F.K.A.)
| | - Sultan Alshehri
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia; (S.A.); (I.A.A.)
| | - Mohammed M. Ghoneim
- Department of Pharmacy Practice, College of Pharmacy, AlMaarefa University, Ad Diriyah 13713, Saudi Arabia;
| | - Ibrahim A. Alsarra
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia; (S.A.); (I.A.A.)
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She J, Sheng R, Qin ZH. Pharmacology and Potential Implications of Nicotinamide Adenine Dinucleotide Precursors. Aging Dis 2021; 12:1879-1897. [PMID: 34881075 PMCID: PMC8612620 DOI: 10.14336/ad.2021.0523] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Accepted: 05/23/2021] [Indexed: 12/21/2022] Open
Abstract
Coenzyme I (nicotinamide adenine dinucleotide, NAD+/NADH) and coenzyme II (nicotinamide adenine dinucleotide phosphate, NADP+/NADPH) are involved in various biological processes in mammalian cells. NAD+ is synthesised through the de novo and salvage pathways, whereas coenzyme II cannot be synthesised de novo. NAD+ is a precursor of coenzyme II. Although NAD+ is synthesised in sufficient amounts under normal conditions, shortage in its supply due to over consumption and its decreased synthesis has been observed with increasing age and under certain disease conditions. Several studies have proved that in a wide range of tissues, such as liver, skin, muscle, pancreas, and fat, the level of NAD+ decreases with age. However, in the brain tissue, the level of NADH gradually increases and that of NAD+ decreases in aged people. The ratio of NAD+/NADH indicates the cellular redox state. A decrease in this ratio affects the cellular anaerobic glycolysis and oxidative phosphorylation functions, which reduces the ability of cells to produce ATP. Therefore, increasing the exogenous NAD+ supply under certain disease conditions or in elderly people may be beneficial. Precursors of NAD+ have been extensively explored and have been reported to effectively increase NAD+ levels and possess a broad range of functions. In this review article, we discuss the pharmacokinetics and pharmacodynamics of NAD+ precursors.
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Affiliation(s)
- Jing She
- Department of Pharmacology and Laboratory of Aging and Nervous Diseases, Jiangsu Key Laboratory of Neuropsychiatric Diseases, College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China
| | - Rui Sheng
- Department of Pharmacology and Laboratory of Aging and Nervous Diseases, Jiangsu Key Laboratory of Neuropsychiatric Diseases, College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China
| | - Zheng-Hong Qin
- Department of Pharmacology and Laboratory of Aging and Nervous Diseases, Jiangsu Key Laboratory of Neuropsychiatric Diseases, College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China
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Caon G, Morrone M, Feistauer L, Sganzerla D, Moreira JC. Moderate beer consumption promotes silymarin-like redox status without affecting the liver integrity in vivo. FOOD BIOSCI 2021. [DOI: 10.1016/j.fbio.2021.101307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Hepatoprotective Effect of Eriobotrya japonica Leaf Extract and Its Various Fractions against Carbon Tetra Chloride Induced Hepatotoxicity in Rats. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2018; 2018:3782768. [PMID: 30643530 PMCID: PMC6311294 DOI: 10.1155/2018/3782768] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/04/2018] [Revised: 11/22/2018] [Accepted: 12/05/2018] [Indexed: 01/22/2023]
Abstract
Eriobotrya japonica is traditionally used as an antipyretic, digestive, and diuretic agent. Its flowers possess free radical-scavenging, antioxidative, and hepatoprotective effects. We investigated the hepatoprotective potential of E. japonica leaf extract and its various fractions against hepatotoxicity in rats. Liver injury was stimulated by the oral administration of carbon tetrachloride (CCl4; 2.5 mL/kg b.wt.). Male albino rats (n = 55) were distributed arbitrarily into 11 groups: Group I, normal control group; Group II, CCl4 (positive control group); Group III, CCl4 + silymarin; Groups IV and V, CCl4 + two doses of 250 and 500 mg/kg of the 80% methanolic extract of E. japonica leaves, respectively; Groups VI and VII, CCl4 + 250 mg/kg and 500 mg/kg of the ethyl acetate fraction, respectively; Groups VIII and IX, CCl4 + 250 and 500 mg/kg of the butanol fraction, respectively; and Groups X and XI, CCl4 + 250 and 500 mg/kg of the aqueous fraction of E. Japonica leaves, respectively. CCl4-treated rats that were given 250 or 500 mg/kg of the methanol extract of E. Japonica leaves, or its ethyl acetate, butanol, or aqueous fractions, had significantly lower levels of biochemical parameters such as alanine aminotransferase, aspartate transaminase, alkaline phosphate, total protein, gamma-glutamyl transferase, and bilirubin levels than those of the CCl4 positive group. However, the extract and fractions did not significantly affect lipid profiles. Thus, we conclude that Eriobotrya leaf extract and its fractions have a hepatoprotective effect against CCl4-induced hepatotoxicity in rats.
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Ustuner D, Colak E, Dincer M, Tekin N, Burukoglu Donmez D, Akyuz F, Colak E, Kolaç UK, Entok E, Ustuner MC. Posttreatment Effects ofOlea EuropaeaL. Leaf Extract on Carbon Tetrachloride-Induced Liver Injury and Oxidative Stress in Rats. J Med Food 2018; 21:899-904. [DOI: 10.1089/jmf.2017.0143] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Derya Ustuner
- Department of Medical Laboratory, Vocational School of Health Services, Eskisehir Osmangazi University, Eskisehir, Turkey
| | - Emine Colak
- Department of Medical Biology, Eskisehir Osmangazi University, Eskisehir, Turkey
| | - Murat Dincer
- Department of Medical Oncology, Faculty of Medicine, Eskisehir Osmangazi University, Eskisehir, Turkey
| | - Neslihan Tekin
- Department of Biotechnology and Molecular Biology, Aksaray University, Aksaray, Turkey
| | - Dilek Burukoglu Donmez
- Department of Histology and Embryology, Faculty of Medicine, Eskisehir Osmangazi University, Eskisehir, Turkey
| | - Fahrettin Akyuz
- Department of Medical Biochemistry, Faculty of Medicine, Eskisehir Osmangazi University, Eskisehir, Turkey
| | - Ertugrul Colak
- Department of Biostatistics and Medical Informatics, Faculty of Medicine, Eskisehir Osmangazi University, Eskisehir, Turkey
| | - Umut Kerem Kolaç
- Department of Medical Biology, Eskisehir Osmangazi University, Eskisehir, Turkey
| | - Emre Entok
- Department of Nuclear Medicine, Faculty of Medicine, Eskisehir Osmangazi University, Eskisehir, Turkey
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Nwidu LL, Oboma YI, Elmorsy E, Carter WG. Hepatoprotective effect of hydromethanolic leaf extract of Musanga cecropioides (Urticaceae) on carbon tetrachloride-induced liver injury and oxidative stress. J Taibah Univ Med Sci 2018; 13:344-354. [PMID: 31435346 PMCID: PMC6694957 DOI: 10.1016/j.jtumed.2018.04.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 04/05/2018] [Accepted: 04/12/2018] [Indexed: 01/31/2023] Open
Abstract
Objective Natural antioxidant products are gaining popularity as treatments for various pathological liver injuries. Musanga cecropioides (Urticaceae) leaf extract is used in ethnomedicine for the management of jaundice and other hepatic ailments in Ibibio, Nigeria. This study evaluated the hepatoprotective and antioxidant effects of M. cecropioides hydromethanolic leaf (MCHL) extract against carbon tetrachloride (CCl4)-induced hepatotoxicity in rats. Methods Liver damage was induced by administering CCl4 dissolved in liquid paraffin (2 mL/kg bw 1:1 intraperitoneally) after pretreatment with MCHL extract for 7 days. Thereafter, acute hepatotoxicity was evaluated in 36 Wistar rats divided into six groups (A–F) of six animals each. Group A served as the negative control; B received CCl4 1 mL/kg only; C–E received 70.7, 141.4, and 282.8 mg/kg MCHL extract, respectively; and F received silymarin 100 mg/kg daily for 7 days by oral gavage. After 48 h, the rats were sacrificed, and samples obtained from them were assayed for histological and biochemical biomarkers of hepatotoxicity. Results The MCHL extracts significantly (p < 0.001–0.05) reduced the increase in aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase (ALP), conjugated bilirubin (CBIL), and total bilirubin (TBIL) levels induced by CCl4 intoxication. There was no significant alteration in haematological indices or weight following administration of the MCHL extracts. Histopathological examinations revealed mitotic bodies in the 141.4 mg/kg MCHL extract-treated rats, an indication of tissue repair processes. Conclusion The MCHL extract has a dose-specific hepatoprotective effect; hence, the utilisation of this extract for the management of hepatitis requires caution.
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Affiliation(s)
- Lucky L Nwidu
- Department of Experimental Pharmacology and Toxicology, Faculty of Pharmaceutical Sciences, University of Port Harcourt, Choba, Nigeria
| | - Yibala I Oboma
- Department of Forensic Medicine and Clinical Toxicology, Faculty of Medicine, Mansoura University, Egypt
| | - Ekramy Elmorsy
- Department of Medical Laboratory Science, Faculty of Basic Medical Sciences, College Health Sciences, Niger Delta University, Wilberforce Island, Bayelsa State, Nigeria
| | - Wayne G Carter
- School of Medicine, University of Nottingham, Royal Derby Hospital Centre, Derby, UK
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Kalam MA, Raish M, Ahmed A, Alkharfy KM, Mohsin K, Alshamsan A, Al-Jenoobi FI, Al-Mohizea AM, Shakeel F. Oral bioavailability enhancement and hepatoprotective effects of thymoquinone by self-nanoemulsifying drug delivery system. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 76:319-329. [PMID: 28482534 DOI: 10.1016/j.msec.2017.03.088] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2016] [Revised: 03/05/2017] [Accepted: 03/12/2017] [Indexed: 01/22/2023]
Abstract
Thymoquinone (TQ) is a poorly water soluble bioactive compound which shows poor oral bioavailability upon oral administration. Due to poor aqueous solubility and bioavailability of TQ, various self-nanoemulsifying drug delivery systems (SNEDDS) of TQ were developed and evaluated for enhancement of its hepatoprotective effects and oral bioavailability. Hepatoprotective and pharmacokinetic studies of TQ suspension and TQ-SNEDDS were carried out in rat models. Different SNEDDS formulations of TQ were developed and thermodynamically stable TQ-SNEDDS were characterized for physicochemical parameters and evaluated for drug release studies via dialysis membrane. Optimized SNEDDS formulation of TQ was selected for further evaluation of in vivo evaluation. In vivo hepatoprotective investigations showed significant hepatoprotective effects for optimized TQ-SNEDDS in comparison with TQ suspension. The oral administration of optimized SNEDDS showed significant improvement in in vivo absorption of TQ in comparison with TQ suspension. The relatively bioavailability of TQ was enhanced 3.87-fold by optimized SNEDDS in comparison with TQ suspension. The results of this research work indicated the potential of SNEDDS in enhancing relative bioavailability and therapeutic effects of natural bioactive compounds such as TQ.
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Affiliation(s)
- Mohd Abul Kalam
- Department of Pharmaceutics, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Mohammad Raish
- Department of Pharmaceutics, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Ajaz Ahmed
- Department of Clinical Pharmacy, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Khalid M Alkharfy
- Department of Clinical Pharmacy, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Kazi Mohsin
- Department of Pharmaceutics, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Aws Alshamsan
- Department of Pharmaceutics, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Fahad I Al-Jenoobi
- Department of Pharmaceutics, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Abdullah M Al-Mohizea
- Department of Pharmaceutics, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
| | - Faiyaz Shakeel
- Department of Pharmaceutics, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia.
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Ameliorative effects of pomegranate on carbon tetrachloride hepatotoxicity in rats: A molecular and histopathological study. Mol Med Rep 2016; 13:3653-60. [DOI: 10.3892/mmr.2016.4956] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Accepted: 02/02/2016] [Indexed: 12/12/2022] Open
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Wang R, Feng X, Zhu K, Zhao X, Suo H. Preventive activity of banana peel polyphenols on CCl 4-induced experimental hepatic injury in Kunming mice. Exp Ther Med 2016; 11:1947-1954. [PMID: 27168833 DOI: 10.3892/etm.2016.3155] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Accepted: 07/13/2015] [Indexed: 12/27/2022] Open
Abstract
The aim of the present study was to evaluate the preventive effects of banana peel polyphenols (BPPs) against hepatic injury. Mice were divide into normal, control, 100 mg/kg and 200 mg/kg banana peel polyphenol and silymarin groups. All the mice except normal mice were induced with hepatic damage using CCl4. The serum and tissue levels of mice were determined by a kit and the tissues were further examined by reverse transcription-quantitative polymerase chain reaction (RT-qPCR) and western blot analysis. BPPs reduced the serum levels of aspartate aminotransferase, alanine aminotransferase and lactate dehydrogenase in a CCl4-induced mouse model of hepatic injury. Furthermore, BPPs reduced the levels of malondialdehyde and triglyceride, while increasing glutathione levels in the serum and liver tissues of mice. In addition, the effects of 200 mg/kg treatment were more evident, and these effects were comparable to those of the drug silymarin. Serum levels of the cytokines, interleukin (IL)-6, IL-12, tumor necrosis factor (TNF)-α and interferon-γ, were reduced in the mice treated with BPPs compared with injury control group mice, and these levels were comparable to those of the normal and silymarin-treated groups. Histopathological examination indicated that BPPs were able to reduce the extent of CCl4-induced liver tissue injury and protect the liver cells. Furthermore, the mRNA and protein expression levels of the inflammation-associated factors cyclooxygenase-2, nitric oxide synthase, TNF-α and IL-1β were reduced in mice treated with BPPs compared with the control group mice. Mice that received 200 mg/kg BPP exhibited reduced expression levels of these factors compared with mice that received 100 mg/kg BPP. In conclusion, the results of the present study suggested that BPPs exert a good preventive effect against hepatic injury.
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Affiliation(s)
- Rui Wang
- Chongqing Collaborative Innovation Center of Functional Food, Chongqing University of Education, Chongqing 400067, P.R. China; Department of Biological and Chemical Engineering, Chongqing University of Education, Chongqing 400067, P.R. China
| | - Xia Feng
- Department of Biological and Chemical Engineering, Chongqing University of Education, Chongqing 400067, P.R. China
| | - Kai Zhu
- Chongqing Collaborative Innovation Center of Functional Food, Chongqing University of Education, Chongqing 400067, P.R. China; Department of Biological and Chemical Engineering, Chongqing University of Education, Chongqing 400067, P.R. China
| | - Xin Zhao
- Chongqing Collaborative Innovation Center of Functional Food, Chongqing University of Education, Chongqing 400067, P.R. China; Department of Biological and Chemical Engineering, Chongqing University of Education, Chongqing 400067, P.R. China
| | - Huayi Suo
- College of Food Science, Southwest University, Chongqing 400715, P.R. China
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Colak E, Ustuner MC, Tekin N, Colak E, Burukoglu D, Degirmenci I, Gunes HV. The hepatocurative effects of Cynara scolymus L. leaf extract on carbon tetrachloride-induced oxidative stress and hepatic injury in rats. SPRINGERPLUS 2016; 5:216. [PMID: 27026910 PMCID: PMC4771653 DOI: 10.1186/s40064-016-1894-1] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/06/2015] [Accepted: 02/17/2016] [Indexed: 01/23/2023]
Abstract
Cynara scolymus is a pharmacologically important medicinal plant containing phenolic acids and flavonoids. Experimental studies indicate antioxidant and hepatoprotective effects of C. scolymus but there have been no studies about therapeutic effects of liver diseases yet. In the present study, hepatocurative effects of C. scolymus leaf extract on carbon tetrachloride (CCl4)-induced oxidative stress and hepatic injury in rats were investigated by serum hepatic enzyme levels, oxidative stress indicator (malondialdehyde-MDA), endogenous antioxidants, DNA fragmentation, p53, caspase 3 and histopathology. Animals were divided into six groups: control, olive oil, CCl4, C. scolymus leaf extract, recovery and curative. CCl4 was administered at a dose of 0.2 mL/kg twice daily on CCl4, recovery and curative groups. Cynara scolymus extract was given orally for 2 weeks at a dose of 1.5 g/kg after CCl4 application on the curative group. Significant decrease of serum alanine-aminotransferase (ALT) and aspartate-aminotransferase (AST) levels were determined in the curative group. MDA levels were significantly lower in the curative group. Significant increase of superoxide dismutase (SOD) and catalase (CAT) activity in the curative group was determined. In the curative group, C. scolymus leaf extract application caused the DNA % fragmentation, p53 and caspase 3 levels of liver tissues towards the normal range. Our results indicated that C. scolymus leaf extract has hepatocurative effects of on CCl4-induced oxidative stress and hepatic injury by reducing lipid peroxidation, providing affected antioxidant systems towards the normal range. It also had positive effects on the pathway of the regulatory mechanism allowing repair of DNA damage on CCl4-induced hepatotoxicity.
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Affiliation(s)
- Emine Colak
- Department of Medical Biology, Faculty of Medicine, Eskisehir Osmangazi University, 26480 Eskisehir, Turkey
| | - Mehmet Cengiz Ustuner
- Department of Medical Biology, Faculty of Medicine, Eskisehir Osmangazi University, 26480 Eskisehir, Turkey
| | - Neslihan Tekin
- Department of Chemistry, Biochemistry Division, Faculty of Arts and Science, Aksaray University, Aksaray, Turkey
| | - Ertugrul Colak
- Department of Biostatistics, Faculty of Medicine, Eskisehir Osmangazi University, Eskisehir, Turkey
| | - Dilek Burukoglu
- Department of Histology and Embryology, Faculty of Medicine, Eskisehir Osmangazi University, Eskisehir, Turkey
| | - Irfan Degirmenci
- Department of Medical Biology, Faculty of Medicine, Eskisehir Osmangazi University, 26480 Eskisehir, Turkey
| | - Hasan Veysi Gunes
- Department of Medical Biology, Faculty of Medicine, Eskisehir Osmangazi University, 26480 Eskisehir, Turkey
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Ma X, Li C, Qi W, Li X, Wang S, Cao X, Wang C. Protective effect of extracellular polysaccharides from Grifola frondosa mycelium on CCl4-injured liver in vitro. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.bcdf.2015.06.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Antioxidative Role of Hatikana (Leea macrophylla Roxb.) Partially Improves the Hepatic Damage Induced by CCl4 in Wistar Albino Rats. BIOMED RESEARCH INTERNATIONAL 2015. [PMID: 26221590 PMCID: PMC4484836 DOI: 10.1155/2015/356729] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
This research investigated the protective role of Leea macrophylla extract on CCl4-induced acute liver injury in rats. Different fractions of Leea macrophylla (Roxb.) crude extract were subjected to analysis for antioxidative effects. Rats were randomly divided into four groups as normal control, hepatic control, and reference control (silymarin) group and treatment group. Evaluations were made for the effects of the fractions on serum enzymes and biochemical parameters of CCl4-induced albino rat. Histopathological screening was also performed to evaluate the changes of liver tissue before and after treatment. Different fractions of Leea macrophylla showed very potent 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging effect, FeCl3 reducing effect, superoxide scavenging effect, and iron chelating effect. Carbon tetrachloride induction increased the level of serum aspartate aminotransferase (AST), alanine aminotransferase (ALT), and alkaline phosphatase (ALP) and other biochemical parameters such as lipid profiles, total protein, and CK-MB. In contrast, treatment of Leea macrophylla reduced the serum aspartate aminotransferase (AST), alanine aminotransferase (ALT), and alkaline phosphatase (ALP) activities as well as biochemical parameters activities. L. macrophylla partially restored the lipid profiles, total protein, and CK-MB. Histopathology showed the treated liver towards restoration. Results evidenced that L. macrophylla can be prospective source of hepatic management in liver injury.
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Pharmacological effect of Kalpaamruthaa on renal and cardiac damage induced by ingestion of aflatoxin B1 studied in wistar rats. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.bionut.2012.10.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Pirinççioğlu M, Kızıl G, Kızıl M, Kanay Z, Ketani A. The protective role of pomegranate juice against carbon tetrachloride–induced oxidative stress in rats. Toxicol Ind Health 2012; 30:910-8. [DOI: 10.1177/0748233712464809] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Most pomegranate ( Punica granatum Linn., Punicaceae) fruit parts are known to possess enormous antioxidant activity. The present study was carried out to determine the phenolic and flavonoid contents of Derik pomegranate juice and determine its effect against carbon tetrachloride (CCl4)-induced toxicity in rats. Animals were divided into four groups ( n = 6): group I: control, group II: CCl4 (1 ml/kg), group III: CCl4 + pomegranate juice and group IV: CCl4 + ursodeoxycholic acid (UDCA). Treatment duration was 4 weeks, and the dose of CCl4 was administered once a week to groups II, III and IV during the experimental period. CCl4-treated rats caused a significant increase in serum enzyme levels, such as aspartate aminotransferase, alanine aminotransferase and total bilirubin, and decrease in albumin, when compared with control. Administration of CCl4 along with pomegranate juice or UDCA significantly reduces these changes. Analysis of lipid peroxide (LPO) levels by thiobarbutiric acid reaction showed a significant increase in liver, kidney and brain tissues of CCl4-treated rats. However, both pomegranate juice and UDCA prevented the increase in LPO level. Histopathological reports also revealed that there is a regenerative activity in the liver and kidney cells. Derik pomegranate juice showed to be hepatoprotective against CCl4-induced hepatic injury. In conclusion, present study reveals a biological evidence that supports the use of pomegranate juice in the treatment of chemical-induced hepatotoxicity.
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Affiliation(s)
| | - Göksel Kızıl
- Chemistry Department, University of Dicle, Diyarbakır, Turkey
| | - Murat Kızıl
- Chemistry Department, University of Dicle, Diyarbakır, Turkey
| | - Zeki Kanay
- Physiology Department, Faculty of Veterinary Science, University of Dicle, Diyarbakır, Turkey
| | - Aydın Ketani
- Histology and Embryology Department, Faculty of Veterinary Science, University of Dicle, Diyarbakır, Turkey
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Parveen R, Baboota S, Ali J, Ahuja A, Vasudev SS, Ahmad S. Effects of silymarin nanoemulsion against carbon tetrachloride-induced hepatic damage. Arch Pharm Res 2011; 34:767-74. [DOI: 10.1007/s12272-011-0510-8] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2010] [Revised: 10/05/2010] [Accepted: 10/20/2010] [Indexed: 02/04/2023]
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18
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Michel CG, El-Sayed NS, Moustafa SF, Ezzat SM, Nesseem DI, El-Alfy TS. Phytochemical and biological investigation of the extracts of Nigella sativa L. seed waste. Drug Test Anal 2011; 3:245-54. [PMID: 21309000 DOI: 10.1002/dta.225] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2010] [Revised: 10/04/2010] [Accepted: 10/08/2010] [Indexed: 11/09/2022]
Abstract
Different extracts of Nigella sativa L. seed waste; aqueous (AE) 200 mg/kg, ethanol 70% (EE) 250 mg/kg and hexane (HE) 10 mg/kg, were evaluated for their hepatoprotective activities. They were administered orally, once daily, for 5 consecutive days. On day 5, liver injury was induced in animals by a single i.p. injection of carbon tetrachloride (10 mg/kg b. w. of 0.25% (v/v). Hepatoxicity produced, was evaluated by both biochemical and histopathological investigations. The aqueous extract attenuated the CCl(4) -induced liver damage likely due to the decrease of proinflammatory cytokines and T-cell proliferation. This was noticed by a significant decrease in both serum and tissue cytokines; tumor necrosis factor-alpha (TNF-α), interferon-gamma (INF-γ) and interlukin-beta (IL-1β), in the markers of liver functions; bilirubin and glutamic pyruvic transaminase (GPT) and in the oxidative stress markers; malondialdehyde (MDA) and glutathione content (GSH). Fractionation of this extract was performed and its component, protein, saponin, and polyphenol fractions were evaluated by appropriate analytical procedures. The crude protein of the seed waste reached 36.85% while protein fingerprint showed four bands ranging from 91.97 KD and 29.00 KD. The saponin content was evaluated through the determination of the haemolytic index and reached 15.56 mg/g dry powder. Finally, Folin Ciocalteu method was used for the determination of the total polyphenols. The same biochemical and histopathological studies were again performed on the different fractions of the aqueous extract; protein fraction (PF) 10 mg/kg, saponin fraction (SF) 5 mg/kg and polyphenol fraction (FF) 10 mg/kg. The biochemical changes were improved only by the protein fraction (PF) of the seed waste of Nigella sativa. This was manifested by a significant reduction in both serum and tissue cytokines in the liver markers and in the oxidative stress markers. Moreover, liver histopathology showed that (PF) reduced the incidence of liver lesions including hepatic cells cloudy swelling, lymphocytes infiltration, hepatic necrosis and fibrous connective tissue proliferation induced by CCl(4) in mice. From this study, it is concluded that the protein fraction of the aqueous extract of Nigella sativa seed waste exhibited a promising hepatoprotective effect in the management of different liver disorders.
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Affiliation(s)
- Camilia G Michel
- Pharmacognosy Department, Faculty of Pharmacy, Cairo University, Kasr El-Aini 11562 Cairo, Egypt.
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Positive Correlation Between the Generation of Reactive Oxygen Species and Activation/Reactivation of Transgene Expression After Hydrodynamic Injections into Mice. Pharm Res 2010; 28:702-11. [DOI: 10.1007/s11095-010-0331-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2010] [Accepted: 11/15/2010] [Indexed: 12/29/2022]
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20
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Kim HY, Kim JK, Choi JH, Jung JY, Oh WY, Kim DC, Lee HS, Kim YS, Kang SS, Lee SH, Lee SM. Hepatoprotective effect of pinoresinol on carbon tetrachloride-induced hepatic damage in mice. J Pharmacol Sci 2010; 112:105-12. [PMID: 20093790 DOI: 10.1254/jphs.09234fp] [Citation(s) in RCA: 266] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
Forsythiae Fructus is known to have diuretic, anti-bacterial, and anti-inflammatory activities. This study examined the hepatoprotective effects of pinoresinol, a lignan isolated from Forsythiae Fructus, against carbon tetrachloride (CCl(4))-induced liver injury. Mice were treated intraperitoneally with vehicle or pinoresinol (25, 50, 100, and 200 mg/kg) 30 min before and 2 h after CCl4 (20 microl/kg) injection. In the vehicle-treated CCl(4 )group, serum aminotransferase activities were significantly increased 24 h after CCl4 injection, and these increases were attenuated by pinoresinol at all doses. Hepatic glutathione contents were significantly decreased and lipid peroxidation was increased after CCl4 treatment. These changes were attenuated by 50 and 100 mg/kg of pinoresinol. The levels of protein and mRNA expression of inflammatory mediators, including tumor necrosis factor-alpha, inducible nitric oxide synthase, and cyclooxygenase-2, were significantly increased after CCl4 injection; and these increases were attenuated by pinoresinol. Nuclear translocation of nuclear factor-kappaB (NF-kappaB) and phosphorylation of c-Jun, one of the components of activating protein 1 (AP-1), were inhibited by pinoresinol. Our results suggest that pinoresinol ameliorates CCl4)-induced acute liver injury, and this protection is likely due to anti-oxidative activity and down-regulation of inflammatory mediators through inhibition of NF-kappaB and AP-1.
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Affiliation(s)
- Hyo-Yeon Kim
- School of Pharmacy, Sungkyunkwan University, Korea
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Bitiren M, Musa D, Ozgonul A, Ozaslan M, Kocyigit A, . OS, E. Guldur M, Kilic I, Karakilcik AZ, Zerin M. Protective Effects of Green tea (Camelia sinensis), Hypericum perforatum and Urtica dioica on Hepatic Injury and Lymphocyte DNA Damage Induced by Carbon Tetrachloride in Wistar Rats. INT J PHARMACOL 2010. [DOI: 10.3923/ijp.2010.241.248] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Ahmed F, Urooj A. Hepatoprotective effects of Ficus racemosa stem bark against carbon tetrachloride-induced hepatic damage in albino rats. PHARMACEUTICAL BIOLOGY 2010; 48:210-216. [PMID: 20645843 DOI: 10.3109/13880200903081788] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
In the present study, the hepatoprotective effects of petroleum ether (FRPE) and methanol (FRME) extract of Ficus racemosa Linn. (Moraceae) stem bark were studied using the model of hepatotoxicity induced by carbon tetrachloride (CCl(4)) in rats. CCl(4) administration induced a significant decrease in serum total protein, albumin, urea and a significant increase (P <or= 0.01) in total bilirubin associated with a marked elevation in the activities of aspartate aminotransferase (AST), alanine aminotransferase (ALT) and alkaline phosphatase (ALP) as compared to control rats. Further, CCl(4) intoxication caused significant increase in the TBARS and decrease in glutathione (GSH) levels in serum, liver and kidney. Pretreatment with FRPE and FRME restored total protein and albumin to near normal levels. Both the extracts resulted in significant decreases in the activities of AST, ALT and ALP, compared to CCl(4)-treated rats. However, a greater degree of reduction was observed in FRME pretreated group (FRPE 43%, 38%, and 33%; FRME 55%, 73%, and 38%). Total bilirubin content decreased from 2.1 mg/dL in CCl(4)-treated rats to 0.8 and 0.3 mg/dL in FRPE and FRME pretreated rats, respectively. The extracts improved the antioxidant status considerably as reflected by low TBARS and high GSH values. FRME exhibited higher hepatoprotective activity than a standard liver tonic (Liv52), while the protective effect of FRPE was similar to that of Liv52. The protective effect of F. racemosa was confirmed by histopathological profiles of the liver. The results indicate that F. racemosa possesses potent hepatoprotective effects against CCl(4)-induced hepatic damage in rats.
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Affiliation(s)
- Faiyaz Ahmed
- Department of Studies in Food Science and Nutrition, University of Mysore, Mysore, India.
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Nishikawa M, Hashida M, Takakura Y. Catalase delivery for inhibiting ROS-mediated tissue injury and tumor metastasis. Adv Drug Deliv Rev 2009; 61:319-26. [PMID: 19385054 DOI: 10.1016/j.addr.2009.01.001] [Citation(s) in RCA: 128] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Reactive oxygen species (ROS) have been suggested to be involved in a variety of human diseases. Catalase, an enzyme degrading hydrogen peroxide, can be used as a therapeutic agent for such diseases, but its successful application will depend on the distribution of the enzyme to the sites where ROS are generated. Chemical modification techniques have been used to control the tissue distribution of catalase, and delivery to hepatocytes (galactosylation), liver nonparenchymal cells (mannosylation or succinylation), kidney (cationization) and the blood pool (PEGylation) has been achieved. The effectiveness of catalase delivery has been demonstrated in animal models for hepatic ischemia/reperfusion injury, chemical-induced tissue injuries and tumor metastasis to the liver, lung and peritoneal organs. Significant inhibition was observed in the ROS-mediated oxidative tissue damages and ROS-mediated upregulation of expression of genes responsible for recruitment of inflammatory cells and for metastatic growth of tumor cells. Because oxygen plays a fundamental key role in our life and oxidative stress is implicated in a wide variety of human diseases, catalase delivery could have wide application in the near future.
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Holownia A, Jablonski J, Skiepko A, Mroz R, Sitko E, Braszko JJ. Ruthenium red protects HepG2 cells overexpressing CYP2E1 against acetaminophen cytotoxicity. Naunyn Schmiedebergs Arch Pharmacol 2008; 379:27-35. [DOI: 10.1007/s00210-008-0343-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2008] [Accepted: 07/29/2008] [Indexed: 01/17/2023]
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25
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Manibusan MK, Odin M, Eastmond DA. Postulated carbon tetrachloride mode of action: a review. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART C, ENVIRONMENTAL CARCINOGENESIS & ECOTOXICOLOGY REVIEWS 2007; 25:185-209. [PMID: 17763046 DOI: 10.1080/10590500701569398] [Citation(s) in RCA: 265] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Under the 2005 U.S. EPA Guidelines for Carcinogen Risk Assessment (1), evaluations of carcinogens rely on mode of action data to better inform dose response assessments. A reassessment of carbon tetrachloride, a model hepatotoxicant and carcinogen, provides an opportunity to incorporate into the assessment biologically relevant mode of action data on its carcinogenesis. Mechanistic studies provide evidence that metabolism of carbon tetrachloride via CYP2E1 to highly reactive free radical metabolites plays a critical role in the postulated mode of action. The primary metabolites, trichloromethyl and trichloromethyl peroxy free radicals, are highly reactive and are capable of covalently binding locally to cellular macromolecules, with preference for fatty acids from membrane phospholipids. The free radicals initiate lipid peroxidation by attacking polyunsaturated fatty acids in membranes, setting off a free radical chain reaction sequence. Lipid peroxidation is known to cause membrane disruption, resulting in the loss of membrane integrity and leakage of microsomal enzymes. By-products of lipid peroxidation include reactive aldehydes that can form protein and DNA adducts and may contribute to hepatotoxicity and carcinogenicity, respectively. Natural antioxidants, including glutathione, are capable of quenching the lipid peroxidation reaction. When glutathione and other antioxidants are depleted, however, opportunities for lipid peroxidation are enhanced. Weakened cellular membranes allow sufficient leakage of calcium into the cytosol to disrupt intracellular calcium homeostasis. High calcium levels in the cytosol activate calcium-dependent proteases and phospholipases that further increase the breakdown of the membranes. Similarly, the increase in intracellular calcium can activate endonucleases that can cause chromosomal damage and also contribute to cell death. Sustained cell regeneration and proliferation following cell death may increase the likelihood of unrepaired spontaneous, lipid peroxidation- or endonuclease-derived mutations that can lead to cancer. Based on this body of scientific evidence, doses that do not cause sustained cytotoxicity and regenerative cell proliferation would subsequently be protective of liver tumors if this is the primary mode of action. To fulfill the mode of action framework, additional research may be necessary to determine alternative mode(s) of action for liver tumors formed via carbon tetrachloride exposure.
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Affiliation(s)
- Mary K Manibusan
- Office of Pesticide Programs, U.S. Environmental Protection Agency, Washington, DC 20460, United States.
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26
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Arun M, Asha VV. Preliminary studies on antihepatotoxic effect of Physalis peruviana Linn. (Solanaceae) against carbon tetrachloride induced acute liver injury in rats. JOURNAL OF ETHNOPHARMACOLOGY 2007; 111:110-4. [PMID: 17161567 DOI: 10.1016/j.jep.2006.10.038] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2006] [Revised: 10/23/2006] [Accepted: 10/31/2006] [Indexed: 05/12/2023]
Abstract
Physalis peruviana is a medicinal herb used by Muthuvan tribes and Tamilian native who reside in the shola forest regions of Kerala, India against jaundice. It was evaluated for its antihepatotoxic, phytochemical analysis and the acute toxicity of the most promising extract in rats. Water, ethanol and hexane extracts of Physalis peruviana (500mg/kg body weight) showed antihepatotoxic activities against CCl(4) induced hepatotoxicity. The ethanol and hexane extracts showed moderate activity compared to water extract, which showed activity at a low dose of 125mg/kg. The results were judged from the serum marker enzymes. Histopathological changes induced by CCl(4) were also significantly reduced by the extract. Further, the extract administration to rats resulted in an increase in hepatic GSH and decrease in MDA. Preliminary phytochemical analysis revealed the presence of various components in the crude aqueous extract. The extract was found to be devoid of any conspicuous acute toxicity in rats.
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Affiliation(s)
- M Arun
- Molecular Ethnopharmacology Lab, Rajiv Gandhi Centre for Biotechnology, Thiruvananthapuram, Kerala, India
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27
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Raghavendran HB, Sathivel A, Yogeeta RSSK, Devaki T. Efficacy of Sargassum polycystum (Phaeophyceae) sulphated polysaccharide against paracetamol-induced DNA fragmentation and modulation of membrane-bound phosphatases during toxic hepatitis. Clin Exp Pharmacol Physiol 2007; 34:142-7. [PMID: 17250630 DOI: 10.1111/j.1440-1681.2007.04539.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
1. The aim of the present study was to assess the protective effect of Sargassum polycystum (sulphated polysaccharide) extract against paracetamol-induced DNA strand breaks and modulation of membrane-bound phosphatases, protein thiols and inorganic cations during toxic hepatitis. 2. Seaweed extract (200 mg/kg per day for 21 days) was administered to male Wistar rats against paracetamol challenge. Serum and liver tissues were used to assess levels of ATPase, protein thiols and inorganic cations using atomic absorption spectroscopy. The fragmentation of DNA was assessed by agarose gel electrophoresis. 3. Paracetamol induced intracellular stress, accompanied by changes in the structural and functional characteristics of liver cell membranes, which affected DNA integrity, membrane-bound ATPase and inorganic cations homeostasis. Rats intoxicated with paracetamol (800 mg/kg, i.p.) showed significant impairment in activities of total ATPase, Mg2+-ATPase, Ca+-ATPase and Na+/K+-ATPase, with concomitant changes in the levels of tissue protein thiols and inorganic cations, such as Na+, K+ and Ca2+. These changes were prevented in animals pretreated with S. polycystum extract, which indicates that S. polycystum supplementation could exert some protective effect against paracetamol-induced toxic hepatitis in rats. 4. The protective effect of the seaweed extract may be due to the presence of sulphated compounds that have free radical-scavenging activity.
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Affiliation(s)
- H B Raghavendran
- Department of Biochemistry, University of Madras, Guindy Campus, Chennai, Tamilnadu, India
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28
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Erickson RR, Dunning LM, Holtzman JL. The effect of aging on the chaperone concentrations in the hepatic, endoplasmic reticulum of male rats: the possible role of protein misfolding due to the loss of chaperones in the decline in physiological function seen with age. J Gerontol A Biol Sci Med Sci 2006; 61:435-43. [PMID: 16720739 DOI: 10.1093/gerona/61.5.435] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The endoplasmic reticulum (ER) chaperones are highly conserved proteins that catalyze the posttranslational processing of all secretory and membrane proteins. Our studies suggest that chaperone declines are one of the two central defects in Alzheimer's disease. We propose that similar declines in other organ systems underlie the physiological deficits of aging. Rats were maintained in a colony from age 21 days to death. Animals were killed at regular intervals, and hepatic, ER chaperone contents were determined by immunoblotting. ERp55, ERp57, ERp72, BiP, and calnexin constitutive levels declined 30%-50% with age. Calreticulin was unaffected. BiP (also known as GRP78), ERp55, and ERp57 showed marked swings with peaks occurring in midwinter and midsummer. This cyclics declined 73% with age. Considering the role of the ER chaperones in membrane and secretory protein posttranslational processing, these data support the concept that their loss could lead to many of the physiological declines associated with aging.
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Affiliation(s)
- Richard R Erickson
- Department of Pharmacology, University of Minnesota, and Research, Veterans Affairs Medical Center, 4710 Girard Ave. S., Minneapolis, MN 55419, USA
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Ma SF, Nishikawa M, Katsumi H, Yamashita F, Hashida M. Liver targeting of catalase by cationization for prevention of acute liver failure in mice. J Control Release 2006; 110:273-282. [PMID: 16316705 DOI: 10.1016/j.jconrel.2005.10.016] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2005] [Revised: 10/06/2005] [Accepted: 10/24/2005] [Indexed: 10/25/2022]
Abstract
To achieve hepatic delivery of CAT for the prevention of CCl4-induced acute liver failure in mice, two types of cationized CAT derivatives, HMD- and ED-conjugated CAT, were developed. Slight structural changes occurred during cationization and the number of increased free amino groups was 3.1 in HMD-CAT and 13.6 in ED-CAT. 111In-cationized CAT derivatives showed an increased binding to HepG2 cells, and were rapidly taken up by the liver. H2O2-induced cytotoxicity in HepG2 cells was significantly prevented by preincubation of the cells with cationized CAT derivatives. A bolus intravenous injection of the cationized CAT derivatives reduced the hepatotoxicity induced by CCl4 in mice. The ED-CAT, which showed more rapid and greater binding to the liver than the HMD-CAT, exhibited more beneficial effects as far as all the parameters examined (serum GOT, GPT, LDH and hepatic GSH) were concerned, suggesting that a high degree of cationization is effective in delivering CAT to the liver to prevent CCl4-induced hepatotoxicity. These results suggest that cationized CAT derivatives are effective in preventing acute liver failure, and ED-based cationization is a suitable method for developing liver-targetable cationized CAT derivatives, because it provides CAT with a high degree of cationization and a high remaining enzymatic activity.
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Affiliation(s)
- Shen-Feng Ma
- Department of Drug Delivery Research, Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Makiya Nishikawa
- Department of Biopharmaceutics and Drug Metabolism, Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Hidemasa Katsumi
- Department of Drug Delivery Research, Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Fumiyoshi Yamashita
- Department of Drug Delivery Research, Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Mitsuru Hashida
- Department of Drug Delivery Research, Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan.
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Chen L, Pan DD, Zhou J, Jiang YZ. Protective effect of selenium-enriched lactobacillus on CCl 4-induced liver injury in mice and its possible mechanisms. World J Gastroenterol 2005; 11:5795-800. [PMID: 16270387 PMCID: PMC4479678 DOI: 10.3748/wjg.v11.i37.5795] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To study the protective effects and mechanisms of Se-enriched lactobacillus on liver injury caused by carbon tetrachloride (CCl4) in mice.
METHODS: Seventy-two ICR mice were randomly divided into four groups: normal group, CCl4-induced model group, low Se-enriched lactobacillus treatment group (L-Se group), and high Se-enriched lactobacillus treatment group (H-Se group). During a 3-wk experimental period, the common complete diet was orally provided daily for normal group and model group, and the mice in L-Se and H-Se groups were given a diet with 2 and 4 mg of organoselenium from Se-enriched lactobacillus per kg feed, respectively. From the 2nd wk of experiment, the model group, L-Se group, and H-Se group received abdominal cavity injection of olive oil solution containing 500 mL/L CCl4 (0.07 mL/100 g body mass) to induce liver injury, and the normal group was given olive oil on every other day for over 2 wk. In the first 2 wk post injection with CCl4, mice in each group were killed. The specimens of blood, liver tissue, and macrophages in abdominal cavity fluid were taken. Then the activities of the following liver tissue injury-associated enzymes including glutathione peroxidase (GSH-Px), superoxide dismutase (SOD), alanine aminotransferase (ALT) and aspartate aminotransferase (AST) as well as malondialdehyde (MDA) content were assayed. Changes of phagocytic rate and phagocytic index in macrophages were observed with Wright-Giemsa stain. Plasma TNF-α level was measured by radioimmunoassay. The level of intracellular free Ca2+ ([Ca2+]i) in hepatocytes was detected under a laser scanning confocal microscope.
RESULTS: During the entire experimental period, the AST and ALT activities in liver were greatly enhanced by CCl4 and completely blunted by both low and high doses of Se-enriched lactobacillus. The Se-enriched lactobacillus-protected liver homogenate GSH-Px and SOD activities were higher or significantly higher than those in model group and were close to those in normal group. CCl4 significantly increased MDA content in liver homogenates, while administration of Se-enriched lactobacillus prevented MDA elevation. Phagocytic rate and phagocytic index of macro-phages decreased after CCl4 treatment compared to those in normal control, but they were dramatically rescued by Se-enriched lactobacillus, showing a greatly higher phagocytic function compared to model group. CCl4 could significantly elevate plasma TNF-α and hepatocyte [Ca2+]ilevel, which were also obviously prevented by Se-enriched lactobacillus.
CONCLUSION: Se-enriched lactobacillus can intervene in CCl4-induced liver injury in mice by enhancing macrophage function activity to keep normal and beneficial effects, elevating antioxidant-enzyme activities and reducing lipid peroxidation reaction, inhibiting excessive release of TNF-α, preventing the dramatic elevation of [Ca2+]i in hepatocytes.
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Affiliation(s)
- Long Chen
- College of Life Sciences, Nanjing Normal University, Nanjing 210097, Jiangsu Province, China.
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Holownia A, Braszko JJ. Acetaminophen alters microsomal ryanodine Ca2+ channel in HepG2 cells overexpressing CYP2E1. Biochem Pharmacol 2004; 68:513-21. [PMID: 15242817 DOI: 10.1016/j.bcp.2004.04.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2004] [Accepted: 04/13/2004] [Indexed: 11/29/2022]
Abstract
Acetaminophen hepatotoxicity is mediated by an initial metabolic activation and covalent binding of drug metabolites to liver proteins. Acetaminophen metabolites have been shown to affect rat liver microsomal Ca2+ stores, but the mechanism is not well understood. The aim of the current work was to find out if the metabolism of acetaminophen by CYP2E1 affects ryanodine-sensitive Ca2+ stores in the endoplasmic reticulum of transduced HepG2 cells. Five millimoles acetaminophen decreased proliferation of CYP2E1-overexpressing HepG2 cells, increased cytosolic Ca2+ levels and produced significant cytotoxicity, while only little, mostly anti-proliferative effects were found in HepG2 cells lacking CYP2E1. CYP2E1 inhibitor-4-methylpyrazole decreased drug cytotoxicity in transduced cells and normalized elevated Ca2+ levels. Acetaminophen cytotoxicity was significantly higher in CYP2E1 expressing cells with depleted glutathione. In the cells engineered to overexpress CYP2E1, an increased [3H]ryanodine affinity (by 45%) and increased ligand maximal binding to ryanodine receptors (by 64%) was observed, most probably due to increased association rate of [3H]ryanodine. Ca2+ loading was decreased by about 53% in microsomal fractions isolated from transduced cells treated with acetaminophen and by 92% in glutathione depleted transfected cells treated with the drug. Ca2+/Mg2+-ATPase activity was unchanged in all microsomal fractions. Such effects were not observed in cells lacking CYP2E1. Our results confirm significant role of CYP2E1 in metabolic activation of acetaminophen and indicate that ryanodine receptors located in the liver endoplasmic reticulum are sensitive targets for acetaminophen metabolites.
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Affiliation(s)
- Adam Holownia
- Department of Clinical Pharmacology, Medical Academy of Bialystok, Waszyngtona 15A, 15-274 Bialystok, Poland.
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Hemmings SJ, Pulga VB, Tran ST, Uwiera RRE. Differential inhibitory effects of carbon tetrachloride on the hepatic plasma membrane, mitochondrial and endoplasmic reticular calcium transport systems: implications to hepatotoxicity. Cell Biochem Funct 2002; 20:47-59. [PMID: 11835270 DOI: 10.1002/cbf.934] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Mitochondrial, endoplasmic reticular and plasma membrane fractions were isolated by a new method from control male Fischer 344 rats and rats given CCl4 by gavage. After 1 h of CCl4 treatment, rats were in glucose and pancreatic hormone balance but plasma levels of T3 and T4 were decreased 29 and 22%, respectively. After 24 hours of CCl4 treatment, rats were: hypoglycaemic and insulin and glucagon levels were increased 33- and 35-fold, respectively; total T4 levels were decreased 62%; while total T3 levels were normalized. In liver fractions from CCl4-treated rats, 1 h after CCl4 administration: (i) calcium binding was decreased 65% in the mitochondrial fraction, 66% in the endoplasmic reticular fraction and 46% in the plasma membrane fraction; (ii) calcium uptake was decreased 59% in the mitochondrial fraction, 46% in the endoplasmic reticular fraction and 37% in the plasma membrane fraction. After 24 h of CCl4 administration: (i) calcium binding was decreased 57% in the mitochondrial fraction, 50% in the endoplasmic reticular fraction and 71% in the plasma membrane fraction; (ii). calcium uptake was decreased 55% in the mitochondrial fraction, 17% in the endoplasmic reticular fraction and 53% in the plasma membrane fraction. In vitro studies indicated the plasma membrane calcium transport system to be rapidly (within a minute) and strongly (>90%) inhibited by CCl4. We conclude that CCl4 produces a differential inhibitory effect on the hepatocyte calcium pumps that are implicated with hepatocellular damage.
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Affiliation(s)
- Susan J Hemmings
- Department of Physiology, College of Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.
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Abstract
Release of mitochondrial calcium is believed to play a key role in the toxicity of acetaminophen in biological systems. Elevated cytosolic Ca2+ may also result from activation of calcium releasing channels. The major metabolites of acetaminophen, benzoquinone imine and 1,4-benzoquinone, induced Ca2+ release in isolated rat liver microsomes. The 1,4-benzoquinone-induced release of calcium was suppressed by ryanodine and fully inhibited by reduced glutathione. Concentrations of 1,4-benzoquinone that induced Ca2+ release did not affect the activity of the microsomal Ca2+, Mg2+-APTase. The binding of [3H]ryanodine to liver microsomes, however, was significantly decreased by 1,4-benzoquinone, suggesting a direct interaction of this metabolite with the ryanodine-binding protein (ryanodine receptor). These results suggest that cellular Ca2+ levels may be elevated by acetaminophen by pathways involving, in part, activation of Ca2+ releasing channels such as the ryanodine receptor.
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Affiliation(s)
- D A Stoyanovsky
- Department of Biochemistry, Mount Sinai School of Medicine, New York, NY 10029, USA
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Abstract
Elevation of cytosolic calcium levels has been shown to occur via oxidation of critical protein thiols in liver microsomes. Elevated cytosolic Ca2+ may also result from activation of calcium releasing channels. In the presence of NADPH or ascorbic acid, iron ions produced a concentration-dependent release of calcium from liver microsomes. Under anaerobic conditions, the iron-induced release of calcium was inhibited, suggesting that a reaction of oxidation triggers the releasing process. The calcium releasing process at pH 7.0 appears to be highly sensitive to activation by iron ions, as effective concentrations (e.g., 2-5 microM) did not alter the Ca2+, Mg2+-ATPase or the phospholipid component of the microsomal membranes. Iron-induced Ca2+-release could occur under conditions in which there was no iron-induced microsomal lipid peroxidation. Under conditions of intense lipid peroxidation, PBN fully prevented the iron-induced accumulation of thiobarbituric reactive reagents without affecting the release of Ca2+, suggesting that lipid peroxidation is not the mechanism by which iron causes release of calcium. Trolox, GSH and high concentrations of ascorbate, however, strongly inhibited the iron-induced calcium release, most likely due to modulation of the Fe2+/Fe3+ ratio. While the IP3 receptor system is considered to be the main regulator of calcium release, liver also contains a ryanodine-sensitive calcium releasing store. The iron-induced calcium release at pH 7.0 was blocked by ruthenium red, a specific inhibitor of the ryanodine receptor, and Fe2+ (but not Fe3+) decreased the binding of ryanodine, a specific ligand for the ryanodine-sensitive calcium channel. These results suggest that redox-cycling of iron ions results in an activation of a ryanodine-sensitive calcium channel. Activation of calcium releasing channels by iron may play a role in the evolution of various hepatic disorders that are associated with chronic iron overload in humans.
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Affiliation(s)
- D A Stoyanovsky
- Department of Biochemistry, Mount Sinai School of Medicine, New York, NY 10029, USA
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Morrison JJ, Charnock-Jones DS, Smith SK. Messenger RNA encoding thiol protein disulphide isomerase in amnion, chorion and placenta in human term and preterm labour. BRITISH JOURNAL OF OBSTETRICS AND GYNAECOLOGY 1996; 103:873-8. [PMID: 8813306 DOI: 10.1111/j.1471-0528.1996.tb09905.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To investigate levels of messenger RNA (mRNA) encoding thiol protein disulphide isomerase, in human amnion, chorion and placenta during pregnancy and in relation to term and preterm labour. DESIGN Amnion, chorion and placenta from 33 women delivered between 24 and 41 weeks of gestation were used in the study. SETTING Reproductive Molecular Research Group, Department of Obstetrics and Gynaecology, University of Cambridge Clinical School, Rosie Maternity Hospital, Cambridge. RESULTS Women who were delivered spontaneously before 30 weeks of gestation had higher levels of mRNA encoding thiol protein disulphide isomerase in placenta and chorion than those who were delivered spontaneously after this time (placenta (P < 0.01, chorion P < 0.01) and compared with those who were delivered by elective caesarean section before 30 weeks of gestation (placenta (P < 0.01, chorion P < 0.05). In the group in whom spontaneous labour occurred, at all gestations studied, there were increased levels of mRNA encoding thiol protein disulphide isomerase in the placenta (P < 0.001) and chorion (P < 0.001) compared with the amnion. CONCLUSION Changes in the steady state level of mRNA encoding thiol protein disulphide isomerase may play a role in the onset of preterm labour before 30 weeks of gestation.
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Affiliation(s)
- J J Morrison
- Department of Obstetrics and Gynaecology, University of Cambridge Clinical School, Rosie Maternity Hospital
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Holtzman JL. The role of covalent binding to microsomal proteins in the hepatotoxicity of acetaminophen. Drug Metab Rev 1995; 27:277-97. [PMID: 7641580 DOI: 10.3109/03602539509029827] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- J L Holtzman
- Medical Service, Veterans Affairs Medical Center, Minneapolis, Minnesota, USA
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Puntarulo S, Cederbaum AI. Ferritin-dependent inactivation of microsomal glucose-6-phosphatase. BIOCHIMICA ET BIOPHYSICA ACTA 1994; 1200:41-7. [PMID: 8186231 DOI: 10.1016/0304-4165(94)90025-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Glucose-6-phosphatase (G6Pase) is a microsomal enzyme which is very sensitive to inactivation by lipid peroxidation. Experiments were carried out to evaluate whether ferritin, which is the major storage form of iron within cells, could catalyze inactivation of G6Pase and to determine the mechanism responsible for this effect of ferritin. Incubation of microsomes with NADPH in the absence of ferritin led to decreased activity of G6Pase. Ferritin stimulated this inactivation of G6Pase in a time- and concentration-dependent manner. Ferritin did not stimulate G6Pase inactivation when NADH replaced NADPH as the microsomal reductant. Superoxide dismutase but not catalase or DMSO prevented the ferritin-stimulated inactivation of G6Pase suggesting a role for superoxide, but not H2O2 or hydroxyl radical, in the overall mechanism. Trolox, at concentrations which prevent lipid peroxidation, also prevented the ferritin-catalyzed inactivation of G6Pase. Inhibition of G6Pase by ferritin was further enhanced in the presence of ATP but was inhibited in the presence of EDTA or desferrioxamine; ferric-ATP stimulates, whereas ferric-EDTA inhibits microsomal lipid peroxidation. The redox cycling agent paraquat increased the ability of ferritin to inactivate G6Pase by a reaction prevented by superoxide dismutase, trolox, EDTA, and desferrioxamine, but not by catalase or DMSO. Ferritin stimulated microsomal light emission, a reaction reflecting lipid peroxidation, with time and concentration dependence, and sensitivity to scavengers (trolox, superoxide dismutase), iron chelators and paraquat, identical to the inactivation of G6Pase. These results indicate that one possible toxicological consequence of ferritin-catalyzed lipid peroxidation is inhibition of microsomal enzymes such as G6Pase.
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Affiliation(s)
- S Puntarulo
- Physical Chemistry Division, School of Pharmacy and Biochemistry, University of Buenos Aires, Argentina
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Chong X, Rahimtula AD. Alterations in ATP-dependent calcium uptake by rat renal cortex microsomes following ochratoxin A administration in vivo or addition in vitro. Biochem Pharmacol 1992; 44:1401-9. [PMID: 1417961 DOI: 10.1016/0006-2952(92)90542-q] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A disruption of calcium homeostasis, leading to a sustained increase in cytosolic calcium levels, has been associated with cytotoxicity in response to a variety of agents in different cell types. We have observed that administration of a single high dose or multiple lower doses of the carcinogenic nephrotoxin ochratoxin A (OTA) to rats resulted in an increase of the renal cortex endoplasmic reticulum ATP-dependent calcium pump activity. The increase was very rapid, being evident within 10 min of OTA administration and remained elevated for at least 6 hr thereafter. The increase in calcium pump activity was inconsistent with previous observations that OTA enhances lipid peroxidation (ethane exhalation) in vivo, a condition known to inhibit the calcium pump. However, no evidence of enhanced lipid peroxidation was observed in the renal cortex since levels of malondialdehyde and a variety of antioxidant enzymes including catalase, DT-diaphorase, superoxide dismutase, glutathione peroxidase, glutathione reductase and glutathione S-transferase were either unaltered or reduced. In in vitro studies, addition of OTA to cortex microsomes during calcium uptake inhibited the uptake process although the effect was reversible. Preincubation of microsomes with NADPH had a profound inhibitory effect on calcium uptake but inclusion of OTA was able to reverse the inhibition. Changes in the rates of microsomal calcium uptake correlated with changes in the steady-state levels of the phosphorylated Mg2+/Ca(2+)-ATPase intermediate, suggesting that in vivo/in vitro conditions were affecting the rate of enzyme phosphorylation.
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Affiliation(s)
- X Chong
- Biochemistry Department, Memorial University, St. John's, NFLD, Canada
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Srivastava S, Chen N, Liu Y, Holtzman J. Purification and characterization of a new isozyme of thiol:protein-disulfide oxidoreductase from rat hepatic microsomes. Relationship of this isozyme to cytosolic phosphatidylinositol-specific phospholipase C form 1A. J Biol Chem 1991. [DOI: 10.1016/s0021-9258(18)54928-0] [Citation(s) in RCA: 58] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Srivastava SP, Chen NQ, Holtzman JL. The effect of substrates and inhibitors of cytochrome P-450 on the NADPH inhibition of the ATP-dependent, hepatic, microsomal calcium pump. FEBS Lett 1990; 276:135-7. [PMID: 2148293 DOI: 10.1016/0014-5793(90)80526-o] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
In hepatic microsomes one or more isozymes of cytochrome P-450 inhibits the ATP-dependent Ca2+ pump. This inhibition is reversible by GSH and appears to be due to a direct oxidation of the pump proteins by the oxygenated cytochrome. To determine which isozyme mediates this inhibition, we have examined the effect of various substrates and inhibitors on the NADPH inhibition of Ca2+ uptake. We find that aminopyrine, benzphetamine and SKF-525A reverse this inhibition while a number of other substrates do not. This pattern suggests that a previously unreported isozyme of cytochrome P-450 mediates the Ca2+ pump inhibition.
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Affiliation(s)
- S P Srivastava
- Department of Pharmacology, University of Minnesota, Minneapolis 55455
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